68780984845 has 8 divisors (see below), whose sum is σ = 87392310264. Its totient is φ = 51788035584.

The previous prime is 68780984771. The next prime is 68780984849. The reversal of 68780984845 is 54848908786.

It can be written as a sum of positive squares in 4 ways, for example, as 16146530761 + 52634454084 = 127069^2 + 229422^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68780984845 - 2¹³ = 68780976653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68780984849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404593944 + ... + 404594113.

It is an arithmetic number, because the mean of its divisors is an integer number (10924038783).

Almost surely, 2^68780984845 is an apocalyptic number.

It is an amenable number.

68780984845 is a deficient number, since it is larger than the sum of its proper divisors (18611325419).

68780984845 is a wasteful number, since it uses less digits than its factorization.

68780984845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809188079.

The product of its (nonzero) digits is 123863040, while the sum is 67.

The spelling of 68780984845 in words is "sixty-eight billion, seven hundred eighty million, nine hundred eighty-four thousand, eight hundred forty-five".